On certain vehicles, water could build up under the carpet in the driver's foot well. If this happens, the water could cause damage to electrical connections. This could cause problems with various electrical systems (like the power windows or power seat) and the wiring harness could short circuit.
A short circuit can create the risk of a fire, even while the vehicle is parked and turned off.
Nissan will notify owners by mail. The corrective actions for this recall are under development.